Faker vs Neosync

Free and open source

From $20 per user/month (indicative, cloud)

Free and open source. You pay in engineering time and CI minutes.

Self-hosting is free; the cloud service is priced per user and record volume.

Everything, self-hosted

Open-source self-hosted edition is free.

Category standard

OSS community · since 2010

Emerging

Nucleus Cloud · since 2023

• Realistic, locale-aware data catches layout bugs that 'test test test' never will.
• Seedable, so generated data is reproducible when a test fails.
• Available in every major language with a similar API.

• Open source and self-hostable, so sensitive data never leaves your infrastructure.
• Preserves referential integrity across tables.
• Far cheaper than the commercial data-privacy platforms.

• Generated data has no referential integrity or business rules — that is your job.
• Random data makes failures harder to reproduce unless you seed deliberately.
• Not a substitute for production-shaped data at realistic volume.

• Young project with a small community.
• Fewer database connectors than the incumbents.
• Self-hosting is operational work.

Every project that needs fixtures more realistic than placeholder strings.

Teams that need anonymised test data but cannot justify enterprise pricing.